The Public Health Code indicates that a physical therapist is entitled to use the following initials to indicate that they are licensed: PT, RPT, LPT, and PTT. Some of these initials represent titles or terms from the past such as RPT and PTT, which are rarely used now.
The terms DPT and MPT refer to a degree awarded by an authorized educational institution.
PTA refers to a physical therapy assistant who is not regulated but who operates under the delegation of a licensed physical therapist.
The Board recommends that you use the term PT after your name to indicate that you hold a license to practice. You can then list educational degrees after PT. For example:
Joan Smith, PT, MA
John Jones, PT, PhD
Sam Striker, PT, DPT